C.G.
Unfortunately, c-sections and epidurals both contribute to breastfeeding difficulties. But, you are obviously committed so I am sure that like many women you will be able to overcome the challenge.
One thing is that if your baby has low blood sugar a good option it to put the baby to breast prior to giving a bottle. Putting the baby to breast then rechecking blood sugar often eliminates giving bottles. Hospitals that do not practice this way are not using good evidence in the protocols. I would talk with your pediatrician prior to the birth to check their (the hospital) practice protocols.
Secondly, if the baby does need a bottle you can try cup or syringe feeding. This means giving formula in a cup or using a small syringe to squirt the formula into the baby's mouth. This allows baby to get the formula without affecting their suck.
Also remember that a newborn baby's stomach is the size of a marble. The do not need much formula or breastmilk to be full. Many nurses will force feed newborns tons of formula and that can only cause problems (excessive spitting up and breastfeeding issues). You could insist on giving the baby a bottle yourself if it is necessary to avoid overfeeding. Your body makes colostrum in very small amounts that are usually perfectly adequate for baby.
Lastly, if baby does end up in NICU/ needing bottles, remember that every bit of stimulation on your breasts helps to bring in your milk. Don't give baby a pacifier, instead put him or her to the breast to satisfy the sucking urge, even if they just had a bottle. It is so tempting to sleep but try to pump on a regular, frequent schedule if baby cannot breastfeed. Remember that baby is far more efficient at getting milk out than a pump so what you see may not be what baby gets.
There are certain medications that can help with milk production, reglan and domperidone are two of them. I would recommend contacting an LC prior to giving birth and setting up a visit for after babe arrives. There is an LC on this board who seems very helpful, I think you may be able to do a search for her.
Good luck to you. I too have faced many breastfeeding challenges so I know what it's like to be there. Just remember that for thousands of years the human race survived on breastfeeding, so there's no reason to believe you can't overcome the challenges. Best wishes.
Adding:
I just wanted to make sure that it's clear that food cannot be given via IV. The IV fluids women are given in labor and sick people get in the hospital are just FLUIDs, there is no nutrition. There is something called TPN that providers nutrition but at the expense of kidney function. Giving nutrition (or breastmilk!) via IV will not be an option unless the baby is very sick and cannot eat anything by mouth.